Effect of Tylenchulus semipenetrans inoculum levels on its development, reproduction potential, and damage to infected-Volkamariana seedlings
Journal Title: Egyptian Journal of Agronematology - Year 2014, Vol 13, Issue 1
Abstract
Six inocula 0, 5000, 10000, 15000, 20000 and 25000 second stage juveniles (J2) and males/pot of T. semipenetrans were tested on 1.5-year-old nematode-free seedlings of Citrus volkameriana. The inoculated seedlings were grown in plastic pots containing about 5 Kg of sterilized sandy clay soil (2:1) under greenhouse conditions for a year. Nematode reproduction and host growth were both affected by the initial inoculum levels. The maximum reduction percentage of shoot length (38.3%), fresh (25.9%), and dry (44.7%) weight as well as root length (36%) and fresh weight (30.5%) were recorded at inoculum levels 20000, 20000, 15000, 25000 and 15000 J2 and males/seedling; respectively. On the other hand, the maximum nematode final population of J2 and males (95515), females (1442), and eggmasses (820) were obtained at initial inoculum levels of 20000, 20000, and 15000 J2 and males/seedling; respectively. A negative relationship occurred between the nematode inoculum level and the rate of reproduction.
Authors and Affiliations
Mahfouz Abd-Elgawad, Faika Koura, Ahmed Abd El-Wahab, Hassan Abd-El-Khair, Sayed Montasser, Moustafa Hammam
Keywords
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